wifi: Add AP bridge operations support (AP+AP Part 2)

AP+AP Part 2 includes:
1. Support bridge in libwifi_system_iface
2. WifiHal API
a. createBridgedApIface (Support create bridge mode AP)
b. removeIfaceInstanceFromBridgedApIface
(Support remove one of the instance in bridge)
3. Framework:
Create bridge AP when multi-bands configured.

Bug: 162686273
Test: atest FrameworksWifiTests
Test: Manual Test (SAP enable normally)
Change-Id: I05ca0e731c4544c8f492319e4631a27c82d3a462
8 files changed
tree: ebc75500036e405a2928d79f181acee12fad60ea
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg